I got my Ph.D. in mathematics from Brown University in 1978. I started out as a pure mathematician in the “Queen of Mathematics” – number theory and that lasted for about 20 years. But then I left academia for good. Once I stopped teaching, I have, among other things, been a visiting scientist at IBM’s Watson Labs and a program director at the National Science Foundation. I’ve written or co-written many books about programming and taught programmers for more than 20 years. I’m most proud of the fact that I was the co-founder and CEO of Apress (www.apress.com) which I made the fastest growing publisher for IT professionals in the world during the period 2000-2007. Source: https://garycornell.com/about/